Once most of the knives used for harvesting figs are folded up the remaining figs in the field are Hefker and they are Patur from Ma'aser.
It is forbidden to benefit from the crown of the Torah.
Belshatzar King of Bavel was killed by Heaven for the Aveirah of benefiting from the utensils of the Beis ha'Mikdash. (1)
A person should not learn Torah for the purpose of being called a Chacham or a Rebbi; instead one should learn out of love, and honor will follow.
A person should not use the Torah as a crown to make himself great or as a spade to dig with.
It is permitted to make yourself known in a place that your deeds are not public knowledge. (2)
A Talmid Chacham has a right to preferential treatment. (3)
A Kohen must be allowed to recite the blessing first on the Torah and to lead the Birkas ha'Mazon and he must be given the first portion whenever portions are divided.
If someone makes a Neder that something shall be forbidden until the harvest it is forbidden until the beginning of the wheat harvest. (4)
If someone makes a Neder Ad ha'Geshamim or Ad She'Yehei ha'Geshamim it is forbidden until the second rain.
R. Shimon Ben Gamliel says that it is forbidden until the usual time of the second rain. (5)
R. Meir says that if someone makes a Neder Ad she'Yafsiku ha'Geshamim it is forbidden until the end of Nisan.
R. Yehudah holds that it is forbidden until the end of Pesach.
A BIT MORE
1. Even though the utensils of the Beis ha'Mikdash became Chulin when the enemies breached the Beis ha'Mikdash it was still forbidden for him to benefit from them.
2. However if your deeds are known the Pasuk says a person shall not praise himself; he should allow others to do so instead.
3. When a Talmid Chacham has a Din Torah his case is heard first.
4. Whenever the wheat harvest starts in the place in which he made the Neder. If he made the Neder in a mountainous place it is forbidden until the harvest of a mountainous place even if after he made the Neder he went to live in a valley.
5. However if he said Ad ha'Geshem everyone agrees that it is forbidden until the time of the first rain.